Turbulence suppression in subsonic jets by high-frequency acoustic excitation

The influence of high-frequency acoustic excitation of a submerged round turbulent jet flowing out of a nozzle with both laminar and turbulent boundary layers at the nozzle outlet on the suppression of turbulent velocity fluctuations in the initial and transition regions of the jet is experimentally investigated. It is established that in the case of the turbulent boundary layer a higher excitation level is needed to realize the suppression effect than in the case of the laminar boundary layer.